This 925/10 silver-filled 4mm 21 gauge closed jump ring is the perfect way to incorporate high-quality touches to any jewelry design. This jump ring is made of 10% silver, compared to 925/20 silver-filled which is only made up of 5% silver. The silver is mechanically bonded to a brass core for a sturdy structure, allowing you to create incredible pieces that have that perfect professional look. With its shiny silver polish, you can mix this finding with any color palette for a lovely complement.